This standard was drafted in accordance with the rules given in GB/T 1.1 —2009

Chinese standard name: Machinery Safety Machinery Equipment Safety Upgrade Guide

English standard name: Safety of machinery-Technical requirments for safety relays

Competent authority: State Administration of Market Supervision and Administration, China National Standardization Administration

Drafting unit: Lihong Safety Equipment Engineering (Shanghai) Co., Ltd.

This standard is applicable to the safety upgrade of in-service machinery and equipment, and is not applicable to the machinery and equipment specifically prescribed by existing national laws and regulations, such as special equipment